- #1
Tycho
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I'm having a real problem with this question, could someone please give me a hand?
A 1260kg freight elevator is supported by a steel cable of diameter 34.9mm. It is loaded with a crowd of people collectively having a mass of 2850kg and it is descending.
a) What is the strain on the cable while the elevator is descending at the constant speed of 2.30 m/s?
b) What is the strain in the cable when it is brought to a stop in 0.600s?
I THOUGHT i was okay with this question at first... but then i realized that i had totally ignored the fact that the elevator is moving downwards! I don't know what i need to do to factor that in?? Help!
A 1260kg freight elevator is supported by a steel cable of diameter 34.9mm. It is loaded with a crowd of people collectively having a mass of 2850kg and it is descending.
a) What is the strain on the cable while the elevator is descending at the constant speed of 2.30 m/s?
b) What is the strain in the cable when it is brought to a stop in 0.600s?
I THOUGHT i was okay with this question at first... but then i realized that i had totally ignored the fact that the elevator is moving downwards! I don't know what i need to do to factor that in?? Help!
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